League of Legends Error Code 900: How to Fix It

Easy 20-45 minutes High Severity Verified June 2026
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Error Code
Error Code 900
Brand
League of Legends
Product Type
game
Severity
High
DIY Difficulty
Easy
Estimated Fix Time
20-45 minutes
League of Legends Error Code 900 indicates a critical game crash that forces the client to close unexpectedly. This error typically triggers the Bug Splat crash reporter, which helps Riot Games identify and fix the underlying issue causing your game to crash.
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Tools You'll Need

How to Fix Error Code Error Code 900

  1. Submit Bug Splat Report

  2. Close All League Processes

  3. Restart League Client as Administrator

  4. Update Graphics Drivers

  5. Repair League Installation

    The repair process may take 30-60 minutes depending on your internet speed and system performance.

  6. Lower In-Game Graphics Settings

  7. Close Background Applications

  8. Check System Temperature

    Ensure your computer is powered off and unplugged before cleaning internal components.
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When to Call a Professional

Contact Riot Games support if crashes persist after trying all steps, or consult a computer technician if you suspect hardware failure indicated by high temperatures, blue screens, or crashes in other games.

Frequently Asked Questions

What causes League of Legends Error Code 900?
Error Code 900 is typically caused by corrupted game files, outdated graphics drivers, overheating hardware, insufficient system resources, or conflicts with other running programs.
Should I always submit the Bug Splat report?
Yes, always submit Bug Splat reports when they appear. These reports help Riot Games identify patterns in crashes and develop fixes for future patches. Include detailed information about what happened before the crash.
Will lowering graphics settings affect my gameplay performance?
Lowering graphics settings may reduce visual quality but can actually improve gameplay performance by increasing frame rates and reducing input lag, especially on older or lower-end systems.
How often should I update my graphics drivers?
Check for graphics driver updates monthly or whenever you experience gaming issues. New drivers often include optimizations and bug fixes specifically for popular games like League of Legends.
Can Error Code 900 cause me to lose ranked games?
Unfortunately, crashes during ranked games typically count as losses and may result in LP loss and potential penalties. However, if crashes are widespread, Riot sometimes provides loss forgiveness during server issues.

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